Concurrency Precon - SQLBits 2019

Faster Queries Without NOLOCK!

SQL Server offers two methods for applications to provide multi-user concurrency and provide data consistency: Pessimistic and Optimistic Concurrency Control. In this seminar we’ll discuss what consistency might mean to your applications, and describe the details of how each concurrency model works internally. We’ll examine the costs and trade-offs between the two models. Finally, we’ll examine the metadata and tools available for analyzing and troubleshooting problems.